Boundary-Layer Meteorology

Items from 1 to 11 out of 11 results

article

Comparison of an Analytical Urban Puff-Dispersion Model with Tracer Observations From the Joint Urban 2003 Field Campaign

Steven Hanna, Joseph Chang, Thomas Mazzola

Boundary-Layer Meteorology > 2019 > 171 > 3 > 377-393

Puffs of SF₆ tracer gas were released at street level in a built-up urban centre (Oklahoma City) during the Joint Urban 2003 (JU2003) field experiment. Although the continuous (20-min) releases during JU2003 have received much attention, the instantaneous “puff” releases have seldom been studied. Ten real-time SF₆ samplers (with 0.5-s resolution) produced useful concentration observations at downwind...

article

A Concept for the Analysis and Presentation of the Ensemble Simulation Results in the UDINEE Exercise

Slawomir Potempski, Piotr Kopka

Boundary-Layer Meteorology > 2019 > 171 > 3 > 537-555

We propose a general concept for the analysis of the results of urban dispersion simulations of high temporal resolution, taking into account multi-model ensembles. We are motivated by theoretical considerations related both to the characteristics of the measurements and to the representation of the multi-model ensemble. Based on typical mathematical notions, we propose and present several indices,...

article

Preface

Stefano Galmarini, Steven Hanna, Tom Mazzola, Joseph Chang

Boundary-Layer Meteorology > 2019 > 171 > 3 > 315-321

article

UDINEE: Evaluation of Multiple Models with Data from the JU2003 Puff Releases in Oklahoma City. Part II: Simulation of Puff Parameters

Miguel A. Hernández-Ceballos, Steven Hanna, Roberto Bianconi, Roberto Bellasio, more

Boundary-Layer Meteorology > 2019 > 171 > 3 > 351-376

The capabilities of nine atmospheric dispersion models in predicting near-field dispersion from puff releases in an urban environment are addressed under the Urban Dispersion INternational Evaluation Exercise (UDINEE) project. The model results are evaluated using tracer observations from the Joint Urban 2003 (JU2003) experiment where neutrally-buoyant puffs were released in the downtown area of Oklahoma...

article

Performance of Hazard Prediction and Assessment Capability Urban Models for the UDINEE Project

Sean Miner, Thomas Mazzola, Steven Herring, Richard Fry, more

Boundary-Layer Meteorology > 2019 > 171 > 3 > 423-437

The Urban Dispersion International Evaluation Exercise (UDINEE) was designed to assess model capability in predicting the effects of a release from a radiological-dispersal device. Here, the dispersion of sulfur hexafluoride (SF₆) releases performed during the Joint Urban 2003 field experiment, which took place in Oklahoma City, was simulated using urban-dispersion and urban-canopy models, with model...

article

UDINEE: Evaluation of Multiple Models with Data from the JU2003 Puff Releases in Oklahoma City. Part I: Comparison of Observed and Predicted Concentrations

Miguel A. Hernández-Ceballos, Steven Hanna, Roberto Bianconi, Roberto Bellasio, more

Boundary-Layer Meteorology > 2019 > 171 > 3 > 323-349

In a complex environment such as an urban area, accurate prediction of the atmospheric dispersion of airborne harmful materials such as radioactive substances is necessary for establishing response actions and assessing risk or damage. Given the variety of urban atmospheric dispersion models available, evaluation and inter-comparison exercises are vital for assessing quantitatively and qualitatively...

article

Assessment of Puff-Dispersion Variability Through Lagrangian and Eulerian Modelling Based on the JU2003 Campaign

Spyros Andronopoulos, John G. Bartzis, George C. Efthimiou, Alexandros G. Venetsanos

Boundary-Layer Meteorology > 2019 > 171 > 3 > 395-422

In the framework of the Urban Dispersion International Evaluation Exercise (UDINEE) project coordinated by the European Commission’s Joint Research Centre, a case study was conducted of the Joint Urban 2003 (JU2003) experimental campaign in the central area of Oklahoma City, USA. The UDINEE project concerned the cases of puff dispersion of the JU2003 campaign, which are of special interest to scenarios...

article

Comparison of the ESTE CBRN Model with the Joint Urban 2003 Experiment

Ľudovít Lipták, Eva Fojcíková, Peter Čarný

Boundary-Layer Meteorology > 2019 > 171 > 3 > 439-464

To model urban airflow and dispersion near buildings and in street canyons, several Gaussian diffusion models, and diagnostic urban models and methods based on computational fluid dynamics (CFD), are developed to provide a fast and adequate response when hazardous material is released. The ESTE CBRN software tool computes the urban atmospheric variables using the Reynolds-averaged Navier–Stokes equations...

article

Validation and Sensitivity Study of the PMSS Modelling System for Puff Releases in the Joint Urban 2003 Field Experiment

Olivier Oldrini, Patrick Armand

Boundary-Layer Meteorology > 2019 > 171 > 3 > 513-535

The Joint Urban 2003 (JU 2003) experimental campaign took place in downtown Oklahoma City, Oklahoma, USA, comprising both continuous and puff releases of sulphur hexafluoride (SF₆) tracer gas. In the framework of the UDINEE project, intensive operation period 8 (IOP 8) conducted during the night is simulated using the Parallel-Micro-SWIFT-SPRAY (PMSS) three-dimensional modelling system. The PMSS modelling...

article

Assessment of the Sensitivity to the Input Conditions with a Lagrangian Particle Dispersion Model in the UDINEE Project

Gianni L. Tinarelli, Silvia Trini Castelli

Boundary-Layer Meteorology > 2019 > 171 > 3 > 491-512

When modelling the dispersion of pollutants in the atmosphere, uncertainty in the simulation results that depend on the available data used as input conditions is a critical issue, particularly in the context of emergency response to the accidental release of harmful substances. In the framework of the UDINEE Project, a Lagrangian particle dispersion model is used to simulate puff emissions in four...

article

Urban Dispersion Modelling Capabilities Related to the UDINEE Intensive Operating Period 4

Piotr Kopka, Slawomir Potempski, Aleksej Kaszko, Michal Korycki

Boundary-Layer Meteorology > 2019 > 171 > 3 > 465-489

The Quick Urban and Industrial Complex (QUIC) atmospheric transport and dispersion modelling system, developed by the Los Alamos National Laboratory, is evaluated using measurement data from the Joint Urban 2003 gas-tracer measurements conducted in Oklahoma City, USA. This activity has been coordinated within the Urban Dispersion International Evaluation Exercise (UDINEE) project, led by the European...

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Number:
3
Volume:
171
Year:
2019

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Keywords

URBAN DISPERSION (4)
JU2003 FIELD EXPERIMENT (3)
PERFORMANCE ANALYSIS (3)
UDINEE PROJECT (3)
ATMOSPHERIC DISPERSION MODELS (2)
EMERGENCY RESPONSE (2)
JOINT URBAN 2003 EXPERIMENT (2)
PUFF DISPERSION (2)
UDINEE EXERCISE (2)
ACCIDENTAL RELEASES (1)
DISPERSION MODELLING (1)
DISPERSION VARIABILITY (1)
EULERIAN DISPERSION MODEL (1)
EULERIAN MODEL (1)
GAUSSIAN PUFF MODEL (1)
HAZARD ASSESSMENT (1)
INDUSTRIAL COMPLEX (1)
INPUT UNCERTAINTY (1)
INSTANTANEOUS RELEASE (1)
JOINT URBAN 2003 (1)
LAGRANGIAN MODEL (1)
MODEL PERFORMANCE (1)
MULTI-MODEL ENSEMBLE (1)
PMSS MODELLING SYSTEM (1)
PMSS VALIDATION (1)
PUFF RELEASES (1)
QUICK URBAN AND INDUSTRIAL COMPLEX (1)
REYNOLDS-AVERAGED NAVIER–STOKES EQUATIONS (1)
URBAN DISPERSION MODELLING (1)
URBAN ENVIRONMENT (1)
URBAN MODELLING (1)
URBAN TRANSPORT (1)
WEATHER RESEARCH AND FORECASTING MODEL (1)
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